Crusher.



W. K. LIGGETT.

CBUSHER.

APPLICATION FILED JULY 28.1914.

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CBUSHER.

APPLICATION FILED JULY 28.1914.

Patented June 4, 1918.

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WILLIAM K. LIGGETT, OF COLUMBUS, OHIO, ASSIGNOR TO THE JEFFREY MANUFAC-TURING COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO.

CRUSHER.

Application led July 28, 1914. Serial No. 858,586.

To all whom t may concern:

Be it known that I, VILLIAM K. LIGGETT, a. citizen of the United States,residing at Columbus, in the county of Franklin and State of Ohio, haveinvented certain new and useful Improvements in Crushers, of which thefollowing is a specification, reference being had therein to theaccompanying drawings. E

My present invention relates particularl to Crushers of the sort knownas single ro l coal crushers.

Previous to my invention machines of this type have not satisfactorilytaken large sizes of coal and reduced them to the de- 'scribed neness ina single operation.

The object of this invention is to produce a machine which will, withoutspecial adjustment, take either large or snall sizes of coal and reducethem to a desired ineness.

The devices by which I accomplish this object are fully Set forth in thefollowing specification and illustrated in the accompanying drawings, ofwhich- Figure 1 is a side elevation of the machine, the side frame beingpartially broken away; Y

Flg. 2 is a transverse vertical sect1on along the'line 2-2 of Fig. 3;

Fig. 3 is a general plan view of the machine. v

Referring to the drawings, the reference numerals 1 and 2 represent theend sections which are securely joined by the cross members 3 and 4 toform a supporting frame for the machine. Journals 5 5 and 6-6 areprovided in these end sections in which are mounted the roll shaft 7 andthe counter shaft 8. These journals are provided with the usualremovable caps so that the machine may be easily taken apart when sodesired. A. hub 9, provided with radial Wings 10 is keyed to one end ofthe shaft 8 and in turn is fastened to a pulley wheel 11 by means ofpins 12 passing through the wings l0 and the arms of the pulley 11.These pins 12 are made of some such material as wood and their crosssection is such that in case of a sudden overload being thrown upon themachine they will shear, thus disconnecting the counter shaft from thedriving element. This provides a safety device such as will eliminateany possible danger of the machine being demolished or the Patented June 4, 1918.

bearings injured, due to sudden and unexpected overloads. i

Mounted on the shaft 7 is a drum roll 13, around the periphery of whichis arranged a series of segmental plates 14, which are preferably formedwith crushing teeth. These segmental sections 14 are fastened to theroll 13 by means of radial bolts 15. The roll 13 is driven by a gear 16mounted on the end of the shaft 7 opposite to the end of the machine onwhich the pulley wheel 11 is mounted. A pinion 17 is fastened to the endof the counter shaft 8 opposite to that on which the hub 9 is keyed, andengages with the gear 16, thereby furnishing driving means for theCrusher roll.

A hopper casing 18 is mounted on the upper portion of the frame and hasattached to its ends, by means of removable bolts 19, end plates 20which serve to inclose the upper portion of the roll. This constructionprovides a removable plate which,

when in place, seals the chamber within which the roll operates, therebypreventing the escape of dust, and also, because of its easy removal,allows access to the bolts 15 so that the segmental sections 14 may beremoved without dismantling the entire machine.

Formed on the counter shaft 8 are eccentrics 21 upon which is pivotallysupported a breaker plate 22 which has across bar 23 attached to itslower end. The projecting ends of the cross bar 23 engage links 24extending radially toward the shaft 7 and attached at their upper endsto the lever bars 25 fulcrumed on the pins 26 fixed in the framecastings 1 and 2. The lever bars 25 are connected at their rear ends tothe adjusting rods 27 which are provided with screw nuts-28 by themanipulation of which the distance between the lower end of the breakerplate and the Crusher roll may be adjusted to regulate the size of theproduct. Between the adjusting nuts 28 and the frame of the machine areinterposed compression springs 29 to form cushions to relieve themachine from shocks due to the accidental introduction of material whichcan not be crushed.

`Then the shaft 8 is rotated the eccentrics 21 will impart to the upperportionof the breaker plate a yratory motion by -which it will coact witthe Crusher roll as a jaw crusher to break up the larger pieces of coal.The lower portion ofthe breaker plate, swinging on the links 24 in apath approximately arallel with the surface of the roll, will hold theresulting fragments to be ground by the teeth of the crushing roll.

What I claim is:

v l. In a crushing apparatus, the combination with a supporting frame,of a crusher roll therein, an approximately vertically arranged concavebreaker plate adjacent the roll, a swinging link pivoted to the lowerend of the plate and having its pivotal support, its pivotal connectionto the plate and the lower end of the plate all in a plane radial totheroll axis, resilient means for holding they link in workin positionand adapted to permit it to yiel outward in the said radial plane, apower actuated shaft adjacent the upper end of the plate, and a rotarycam carried by said shaft which imparts ower to the plate in all radialdirections om the shaft axis, the inner concave surface of said platebeing extended to points above the horizontal plane of the shaft axiswhereby the upper part of the plate is positively forced downward towardthe roll axis.

2. In a crushing apparatus, the combination of a revolving crusher roll,a gyrating breaker plate having an operative concave surface extendingfrom a horizontal plane below the roll upward to a horizontal planeabove the roll, a pivotal support for the lower part of the plate,resilient means for yieldingly holding the pivotal support and the lowerpart of the plate in operative position against the pressure of thematerial being crushed, and means connected to the upper part of theplate for positively driving said plate downward, inward, outward and uward.v

3. n a crushing apparatus, the combination with a revolving crusherroll, of a gyrating breaker plate having an operative concave surfaceextending from a horizontal plane below the roll to a horizontal planeabove the roll, its lower end being mounted to move vertically and tomove radially relatively to the roll, and a power shaft having its axisin a horizontal plane below the second mentioned horizontal plane andadapted to positively impart power to the plate during the entirety ofeach revolution.

4. In a crushing apparatus, the combination with a supporting frame, ofa crushing roll, a hopper having a chamber or passage through whichmaterial is guided toward the roll, a concaved breaker plate adjacenttion with a supporting frame, of a lcrushing j roll in the frame, aconcave breaker plate adjacent the roll, a hopper or passageway throughwhich material is guided toward the roll, a concave breaker plate havingits lower end supported near the operative surface of the roll andhaving a projection integral with its upper end and extending into thesaid passage, the concave breaking surface of the plate including thesurface of the said projection, a power shaft, and power transmittingdevices positively engaging with the plate throughout .the entirety ofeach revolution of the shaft and causing the said projection to moveinward and outward .in the passage and advance material toward the rolland to move downward toward the roll to crush the said materialsupplemental to the crushing action of the plate caused by its motioninward toward the roll.

6. In a crushing apparatus, the combination of a supporting frame, acrusher roll, an upright breaker plate having a concave working surfaceadjacent the crusher roll, means for pivotally supporting the lower partof the crusher plate, and means for moving the upper partvof the plateinward and outward and upward and downward, the said pivotal supportingmeans for the lower part of the plate being adapted to perf mit theplate to yield outward from the roll independently of the movement ofthe upper part of the plate.

In testimony whereof, I affix my signature, in presence of twowitnesses.

WILLIAM K. LIGGETT.

Witnesses:

STANLEY F. OssINo, DUDLEY T. FISHER.

